writer：Binbin Yu1, Zhong Zeng2, Qinyu Ren1, Yang Chen1, Mei Liang1*, Huawei Zou1*
keywords：Polycarboxylate superplasticizer, RAFT polymerization, Cement, Mortar fluidity
source：期刊
specific source：Journal of Molecular Structure, 2016, 1120: 171-179.
Issue time：2016年

ABSTRACT: A series of block type polycarboxylate-based superplasticizers (PCs) with different molecular architectures were synthesized with macromonomer butenyl alkylene polyoxyethylene-polyoxypropylene ether (BAPP) and acrylic acid (AA) by reversible additionefragmentation chain transfer (RAFT) polymerization. Fourier-Transformed Infrared (FTIR) Spectroscopy and dynamic light scattering (DLS) were applied to investigate the PCs’ molecular structure. The dispersion capacity of the PCs in cement were also measured, and the results showed that the polycarboxylic dispersing agents prepared by this method were suitable for portlant cement. It was found that the PCs could affect the hydration process, which was performed through retarding the generation of ettringite in the hydrated product. Our studies with X-ray diffraction (XRD), scanning electron microscopy (SEM) and compressive strength measurement of hydrated production were all supporting this conclusion.